[S390] Calibrate delay and bogomips.

Preset the bogomips number to the cpu capacity value reported by
store system information in SYSIB 1.2.2. This value is constant
for a particular machine model and can be used to determine
relative performance differences between machines.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/include/asm-s390/sfp-util.h b/include/asm-s390/sfp-util.h
new file mode 100644
index 000000000000..8cabcd23d976
--- /dev/null
+++ b/include/asm-s390/sfp-util.h
@@ -0,0 +1,66 @@
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#define add_ssaaaa(sh, sl, ah, al, bh, bl) ({           \
+        unsigned int __sh = (ah);                       \
+        unsigned int __sl = (al);                       \
+        asm volatile(                                   \
+                "       alr     %1,%3\n"                \
+                "       brc     12,0f\n"                \
+                "       ahi     %0,1\n"                 \
+                "0:     alr  %0,%2"                     \
+                : "+&d" (__sh), "+d" (__sl)             \
+                : "d" (bh), "d" (bl) : "cc");           \
+        (sh) = __sh;                                    \
+        (sl) = __sl;                                    \
+})
+
+#define sub_ddmmss(sh, sl, ah, al, bh, bl) ({           \
+        unsigned int __sh = (ah);                       \
+        unsigned int __sl = (al);                       \
+        asm volatile(                                   \
+                "       slr     %1,%3\n"                \
+                "       brc     3,0f\n"                 \
+                "       ahi     %0,-1\n"                \
+                "0:     slr     %0,%2"                  \
+                : "+&d" (__sh), "+d" (__sl)             \
+                : "d" (bh), "d" (bl) : "cc");           \
+        (sh) = __sh;                                    \
+        (sl) = __sl;                                    \
+})
+
+/* a umul b = a mul b + (a>=2<<31) ? b<<32:0 + (b>=2<<31) ? a<<32:0 */
+#define umul_ppmm(wh, wl, u, v) ({                      \
+        unsigned int __wh = u;                          \
+        unsigned int __wl = v;                          \
+        asm volatile(                                   \
+                "       ltr     1,%0\n"                 \
+                "       mr      0,%1\n"                 \
+                "       jnm     0f\n"                           \
+                "       alr     0,%1\n"                 \
+                "0:     ltr     %1,%1\n"                        \
+                "       jnm     1f\n"                           \
+                "       alr     0,%0\n"                 \
+                "1:     lr      %0,0\n"                 \
+                "       lr      %1,1\n"                 \
+                : "+d" (__wh), "+d" (__wl)              \
+                : : "0", "1", "cc");                    \
+        wh = __wh;                                      \
+        wl = __wl;                                      \
+})
+
+#define udiv_qrnnd(q, r, n1, n0, d)                     \
+  do { unsigned int __r;                                \
+    (q) = __udiv_qrnnd (&__r, (n1), (n0), (d));         \
+    (r) = __r;                                          \
+  } while (0)
+extern unsigned long __udiv_qrnnd (unsigned int *, unsigned int,
+                                   unsigned int , unsigned int);
+
+#define UDIV_NEEDS_NORMALIZATION 0
+
+#define abort() return 0
+
+#define __BYTE_ORDER __BIG_ENDIAN